石油地震地质学在埕海地区的应用
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摘要
近年来的研究和勘探结果表明,埕海地区紧邻歧口生油凹陷,是一个复式油气富集带,是今后勘探开发的重点地区。该区的低台阶区勘探程度低,主要目的层之一的古近系沙河街组二段(Es2)沉积储层分布规律不清,现有的研究成果不能满足勘探生产的需要。石油地震地质学在研究方法上强调了地震与地质的有机结合,在研究尺度上强调了地质资料与地震分辨率的匹配,在研究资料上强调了高精度三维地震资料的应用,在研究结果上强调了油气藏的发现和高效开发。根据埕海地区实际地质情况,运用石油地震地质学方法,在现有地震解释成果的基础上,运用子波反褶积、小波分频成像等技术进行了地震资料品质改善;运用波形聚类、时频三原色、有色反演波阻抗等手段进行了地震相及储层预测。从宏观到微观、从定性到定量地描述了有利储层在纵横向上的变化,对储层进行了精细刻画,预测了有利储层的分布,落实了有利勘探目标,提高了勘探成功率,获得了较好的勘探效果。
Research and exploration results showed that Chenghai Area was close to Qikou Sag which was a complex oil-gas enrichment zone,it was the focus area of oil-gas exploration and development.It was a low degree of oil-gas exploration area in the low step block of Chenghai Area,the distribution rule of sediment in the second member of Shahejie Formation(Es2) as one of the main target zones was not clear,and existing research results could not meet the needs of oil-gas exploration and development.the organic combination of seismic with geology was emphasized in petroleum seismo-geology for research methods,it highlighted matches between geological data and seismic resolution in research scale,the application of high-precision 3D seismic data was emphasized in research materials,the discovery of oil-gas reservoirs and high-effective development was emphasized in research results.According to the actual geological conditions and based on available seismic interpretation results,the technologies of petroleum seismo-geology,wavelet deconvolution and wavelet transform image were used to improve the quality of seismic data.And by using the method of waveform clustering,time-frequency RGB,colored inversion of wave impedance the seismic facies and reservoir were predicted.And the research results can describe the changes of favorable reservoirs in the vertical and horizontal directions qualitatively and quantitatively from macroscope to microscope.And based on the above study,the distribution of favorable reservoirs are predicted for improving the exploration success rate,and good results of oil-gas exploration are obtained.
Research and exploration results showed that Chenghai Area was close to Qikou Sag which was a complex oil-gas enrichment zone,it was the focus area of oil-gas exploration and development.It was a low degree of oil-gas exploration area in the low step block of Chenghai Area,the distribution rule of sediment in the second member of Shahejie Formation(Es2) as one of the main target zones was not clear,and existing research results could not meet the needs of oil-gas exploration and development.the organic combination of seismic with geology was emphasized in petroleum seismo-geology for research methods,it highlighted matches between geological data and seismic resolution in research scale,the application of high-precision 3D seismic data was emphasized in research materials,the discovery of oil-gas reservoirs and high-effective development was emphasized in research results.According to the actual geological conditions and based on available seismic interpretation results,the technologies of petroleum seismo-geology,wavelet deconvolution and wavelet transform image were used to improve the quality of seismic data.And by using the method of waveform clustering,time-frequency RGB,colored inversion of wave impedance the seismic facies and reservoir were predicted.And the research results can describe the changes of favorable reservoirs in the vertical and horizontal directions qualitatively and quantitatively from macroscope to microscope.And based on the above study,the distribution of favorable reservoirs are predicted for improving the exploration success rate,and good results of oil-gas exploration are obtained.
引文
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[3]Zeng Hongliu,Hentz T F.High-frequency sequence stratigraphy from seismic sedimentology:Applied to Miocene,VermilionBlock50,Tiger Shoal area,offshore Louisiana[J].AAPG Bulletin,2004,88(2):153～174.
[4]Zeng Hongliu,Kerans C.Seismic frequency control on carbonate seismic stratigraphy:A case study of the Kingdom Abo sequence,west Texas[J].AAPG Bulletin,2003,87(2):273～293.
[5]林承焰,张宪国.石油地震地质学探讨及展望[J].岩性油气藏,2011,23(1):17～22.
[6]卫平生,潘建国,张虎权,等.地震储层学的概念、研究方法和关键技术[J].岩性油气藏,2010,22(2):1～6.
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